i cant open a purchased book of 15 dollars because it says that i "have reched the device limit" but i only have the computer and a phone i need to restore that devices . what can i do

i cant open a purchased book of 15 dollars because it says that i "have reched the device limit" but i only have the computer and a phone i need to restore that devices . what can i do

how could i contact the people of adobe i try but i only need to reset the limit in order to read just one book.